Specifications

Appendix A: Preparing Cisco SRST Support for SIP
DTMF Relay for SIP Applications and Voice Mail
158
Cisco IOS Survivable Remote Site Telephony Version 3.4 System Administrator Guide
DETAILED STEPS
Troubleshooting Tips
The show sip-ua status command output displays the time interval between consecutive NOTIFY
messages for a telephone event. In the following example, the time interval is 2000 ms.
Router# show sip-ua status
SIP User Agent Status
SIP User Agent for UDP :ENABLED
SIP User Agent for TCP :ENABLED
SIP User Agent bind status(signaling):DISABLED
SIP User Agent bind status(media):DISABLED
SIP early-media for 180 responses with SDP:ENABLED
SIP max-forwards :6
SIP DNS SRV version:2 (rfc 2782)
NAT Settings for the SIP-UA
Role in SDP:NONE
Check media source packets:DISABLED
Maximum duration for a telephone-event in NOTIFYs:2000 ms
Command or Action Purpose
Step 1
dial-peer voice tag voip
Example:
Router(config)# dial-peer voice 2 voip
Enters dial-peer configuration mode.
Step 2
dtmf-relay sip-notify
Example:
Router(config-dial-peer)# dtmf-relay sip-notify
Forwards DTMF tones using SIP NOTIFY messages.
Step 3
exit
Example:
Router(config-dial-peer)# exit
Exits dial-peer configuration mode.
Step 4
sip-ua
Example:
Router(config)# sip-ua
Enables SIP user-agent configuration mode.
Step 5
notify telephone-event max-duration time
Example:
Router(config-sip-ua)# notify telephone-event
max-duration 2000
Configures the maximum time interval allowed
between two consecutive NOTIFY messages for a
single DTMF event.
• max-duration time—Time interval between
consecutive NOTIFY messages for a single
DTMF event, in milliseconds. Range is from 500
to 3000. Default is 2000.
Step 6
exit
Example:
Router(config-sip-ua)# exit
Exits SIP user-agent configuration mode.